—Why do you look worried?— Because what I am really concerned about is ____

—Why do you look worried?— Because what I am really concerned about is _____my friend can do me a favor or not..

#32847

although

whether

when

where

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#32289

Since

Once

Unless

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Bring the plants into a warm room _____ they will soon open.

#32285

and

but

for

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#31515

before

until

while

since

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#31256

and

when

but

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#30921

but

when

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